Arv has been demoted to an incubus by the demon world and banished to the human world. Incubuses are low-level demons that invade the dreams of human women and tempt them by showing them lewd dreams. Arv chooses Nonaka, a dull new employee at the same workplace as Haruko, his host.. However, the dream that Arv has invaded is actually a "BL fantasy." Arv's magical powers have no effect on her, and instead, Haruko becomes angry, saying, "You have ruined my dream !"